Top wire former of fourdrinier wire forming machine suitable for high-speed special paper machine
By designing a long-wire forming device with a reverse suction box and a correction device on a high-speed special paper machine, the problems of rough paper wire surface and poor uniformity have been solved, achieving efficient and precise paper conditioning and dewatering control, thus improving paper quality and equipment applicability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUYANG CHUANGXIN PAPER MAKING MACHINERY
- Filing Date
- 2025-12-31
- Publication Date
- 2026-04-21
AI Technical Summary
During the processing of high-speed special paper machines, the paper filler and fine fibers are retained at a low level, resulting in a rough paper wire surface, large differences between the two sides, and poor paper uniformity. Existing top wire forming devices have problems with low efficiency and insufficient precision in adjustment and correction.
A top wire forming device for a long wire forming machine is designed, comprising a frame, an adjustment structure, an inlet roller, an inlet box, a reverse suction box, an outlet box, an outlet roller, a top wire, and a bottom wire. The reverse suction box structure is used for paper dewatering on the reverse side. Combined with a correction device and a wire tightening device, efficient adjustment and precise control are achieved through electric screw adjustment and a high-pressure cleaning device.
It improves paper processing efficiency and consistency, enhances the adjustment accuracy of the top wire, prevents equipment damage, adapts to the processing needs of different types of paper, and improves paper quality.
Smart Images
Figure CN121896852A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of papermaking technology, and more specifically to a top wire former for a long-wire forming machine suitable for high-speed special paper machines. Background Technology
[0002] Currently, high-speed specialty paper machines, due to their high processing speed, result in lower retention of fillers and fine fibers on the wire side of the paper sheet. This leads to a rougher wire surface compared to the front, resulting in significant differences between the two sides of the paper. Simultaneously, as dewatering progresses in the wire section, the pulp concentration continuously increases, causing fibers within the pulp to begin flocculating. With further increases in concentration, the degree of flocculation intensifies, ultimately resulting in poor paper uniformity. Therefore, a top wire formper is an excellent choice for further improving the quality of paper formed using the wire section.
[0003] A top-forming wire is a forming wire added above the wires of a long-wire paper machine before the wet paper web is shaped. The wet paper web passes between the two wires, allowing the top and bottom surfaces of the paper web to be dehydrated. At the same time, the squeezing and hydraulic action between the two wires disperses fiber flocculation, reduces fiber clumps in the wet paper web, improves paper web uniformity, and reduces the difference between the two sides of the paper web structure, thereby achieving the goal of significantly improving paper quality.
[0004] In existing technologies, the top wire structure needs to be adjusted for different types of paper during processing. At the same time, calibration is also required for long-term processing of the same type of paper to prevent errors caused by long-term operation. Therefore, there is a need for a top wire forming device for a long wire forming machine that has high processing efficiency, high paper consistency, high dryness, and is easy to adjust for different types of paper. Summary of the Invention
[0005] To address the aforementioned issues, a top wire forming device for a long wire forming machine is provided, which offers high processing efficiency, high paper consistency, high dryness, and is easily adjustable for processing different types of paper.
[0006] A top wire forming device for a long-wire forming machine suitable for high-speed special paper machines includes a frame, an adjustment structure, an inlet roller, an inlet box, a back suction box, an outlet box, an outlet roller, a top wire, and a bottom wire. The adjustment structure includes a correction device and a wire tightening device, which are fixedly connected to the frame. A high-pressure cleaning device is provided between the correction device and the wire tightening device. The back suction box is fixedly connected to the frame, and a water suction port is provided at the bottom of the back suction box, located inside the top wire.
[0007] Preferably, the top of the frame includes a horizontal part and an inclined part, the net tightening device is located on the inclined part, the net tightening device includes a base, a spring fixedly connected to the base, a rotating platform hinged to the base, a rotating wheel fixedly connected to the rotating platform, and adjusting rods at both ends connected to the rotating platform and the base respectively, and the spring is located between the rotating platform and the base.
[0008] Preferably, the calibration device includes a fixed base, a sliding platform, an electric lead screw, and a calibration wheel. The electric lead screw is fixed on the fixed base, which is located on the horizontal part. The sliding platform is connected to the electric lead screw, and the calibration wheel is fixedly connected to the sliding platform.
[0009] Preferably, the side of the back suction box is provided with a first fixing frame, which is hinged to the frame. The other side of the back suction box is connected to a second fixing frame, which has a piston that is hinged to the frame.
[0010] Preferably, the second fixed frame is further provided with a protective rod, which is hinged to the frame. The second fixed frame is provided with a sliding block, and the protective rod is provided with a sliding groove, in which the sliding block is slidably connected.
[0011] Preferably, the high-pressure cleaning device includes a fixed column, a water mist box connected to the fixed column, and an external pressurizing device, with the top net located outside the water mist box.
[0012] Preferably, the base includes a fixing member and a sliding member, the sliding member being slidably connected to the fixing member, and a piston being provided on the fixing post, the piston being fixedly connected to the sliding member.
[0013] The beneficial effects of this invention are as follows: 1. This invention adopts a reverse suction box structure, which allows for dehydration of the reverse side of the paper from above during the use of the wire forming machine, achieving rapid forming.
[0014] 2. The top of the frame of the present invention includes a horizontal part and an inclined part. When using the net tightening device, large-scale adjustment and fine-tuning can be performed by adjusting the sliding member and the adjusting rod. At the same time, due to the presence of the inclined part, the accuracy of net tightening adjustment can be improved, and the rotating wheel can move in the inclined direction, which helps to prevent damage to the top net. It has the advantages of easy adjustment and high adjustment accuracy.
[0015] 3. This invention employs an electric lead screw adjustment and correction device, which has high adjustment accuracy. Furthermore, the movement direction of the correction wheel on the correction device is basically the same as the movement direction of the rotating wheel adjustment, which helps to prevent damage to the top net during the adjustment process.
[0016] 4. This invention can adjust the distance between the back suction box and the top screen by adjusting the piston, thereby controlling the dewatering efficiency and improving the applicability of the invention, which can be adjusted for different pulps.
[0017] 5. This invention employs a protective rod structure to prevent the back suction box from falling and damaging the equipment. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of one structure of the present invention; Figure 2 This is a schematic diagram of the reverse suction box. Figure 3 This is a schematic diagram of the calibration device; Figure 4 This is a schematic diagram of the tensioning netting device. Detailed Implementation
[0019] The invention will be further explained below with reference to specific implementation examples.
[0020] A top wire forming device for a long-wire forming machine suitable for high-speed special paper machines includes a frame 1, an adjustment structure 2, an inlet roller 3, an inlet box 4, a back suction box 5, an outlet box 6, an outlet roller 7, a top wire 8, and a bottom wire 9. The adjustment structure 2 includes a correction device 10 and a wire tensioning device 11, which are fixedly connected to the frame 1. A high-pressure cleaning device 12 is provided between the correction device 10 and the wire tensioning device 11. The back suction box 5 is fixedly connected to the frame 1, and a water suction port is provided at the bottom of the back suction box 5. The water suction port is located inside the top wire 8. The top of the frame 1 includes a horizontal section 13 and an inclined section 14. The tensioning device 11 is located on the inclined section 14. The tensioning device 11 includes a base 15, a spring 16 fixedly connected to the base 15, a rotating platform 17 hinged to the base 15, a rotating wheel 31 fixedly connected to the rotating platform 17, and adjusting rods 18 whose ends are respectively connected to the rotating platform 17 and the base 15. The spring 16 is located between the rotating platform 17 and the base 15. The correction device 10 includes a fixed base 19, a sliding platform 20, an electric lead screw 21, and a correction wheel 22. The electric lead screw 21 is fixed to the fixed base 19, which is located on the horizontal section 13. The sliding platform 20 is connected to the electric lead screw, and the correction wheel is fixedly connected to the sliding platform. The back suction box 5 has a first fixing frame 32 on its side, which is hinged to the frame 1. A second fixing frame 33 is connected to the other side of the back suction box 5. A piston 23 is mounted on the second fixing frame 33 and is hinged to the frame 1. A protective rod 24 is also mounted on the second fixing frame 33 and is hinged to the frame 1. A sliding block 25 is mounted on the second fixing frame 33, and a sliding groove 26 is mounted on the protective rod. The sliding block is slidably connected to the sliding groove. The high-pressure cleaning device 12 includes a fixing column 27, a water mist box 28 connected to the fixing column, and an external pressurizing device. The top net 8 is located outside the water mist box 28. The base 15 includes a fixing member 29 and a sliding member 30. The sliding member 30 is slidably connected to the fixing member. A piston 23 is mounted on the fixing column 27, and the piston and the sliding member are fixedly connected.
[0021] This invention employs a reverse suction box 5 structure, allowing for dewatering of the reverse side of the paper from above during the use of the wire forming machine, achieving rapid forming. The top of the frame 1 includes a horizontal section 13 and an inclined section 14. When using the wire tensioning device 11, large-scale and fine-tuning can be performed by adjusting the sliding member and the adjusting rod 18. Simultaneously, the presence of the inclined section 14 enhances the precision of wire tensioning adjustment and allows the rotating wheel to move in the inclined direction, helping to prevent damage to the top wire 8. This invention offers advantages such as easy adjustment and high adjustment precision. The invention utilizes an electric screw adjustment and correction device 10, providing high adjustment precision. Furthermore, the movement direction of the correction wheel on the correction device 10 is essentially the same as the movement direction of the rotating wheel adjustment, helping to prevent damage to the top wire 8 during adjustment. This invention can adjust the distance between the reverse suction box 5 and the top wire 8 via a piston adjustment, thereby controlling the dewatering efficiency and improving the applicability of the invention, allowing adjustment for different pulps. This invention employs a protective rod structure to prevent the reverse suction box 5 from falling and damaging the equipment.
Claims
1. A top wire forming device for a long-wire forming machine suitable for high-speed special paper machines, characterized in that... The device includes a frame, an adjustment structure, an inlet roller, an inlet box, a back suction box, an outlet box, an outlet roller, a top net, and a bottom net. The adjustment structure includes a correction device and a net tightening device, which are fixedly connected to the frame. A high-pressure cleaning device is provided between the correction device and the net tightening device. The back suction box is fixedly connected to the frame, and a water suction port is provided at the bottom of the back suction box, located inside the top net.
2. The top wire forming device for a long-wire forming machine suitable for high-speed special paper machines according to claim 1, characterized in that... The top of the frame includes a horizontal part and an inclined part. The tensioning device is located on the inclined part. The tensioning device includes a base, a spring fixedly connected to the base, a rotating platform hinged to the base, a rotating wheel fixedly connected to the rotating platform, and adjusting rods at both ends connected to the rotating platform and the base, respectively. The spring is located between the rotating platform and the base.
3. The top wire forming device for a long-wire forming machine suitable for high-speed special paper machines according to claim 2, characterized in that... The calibration device includes a fixed base, a sliding platform, an electric lead screw, and a calibration wheel. The electric lead screw is fixed on the fixed base, which is located on the horizontal part. The sliding platform is connected to the electric lead screw, and the calibration wheel is fixedly connected to the sliding platform.
4. The top wire forming device for a long-wire forming machine suitable for high-speed special paper machines according to claim 3, characterized in that... The side of the back suction box is provided with a first fixing frame, which is hinged to the frame. The other side of the back suction box is connected to a second fixing frame, which has a piston that is hinged to the frame.
5. A top wire forming device for a long-wire forming machine suitable for high-speed special paper machines according to claim 4, characterized in that... The second fixed frame is also provided with a protective rod, which is hinged to the frame. The second fixed frame is provided with a sliding block, and the protective rod is provided with a sliding groove. The sliding block is slidably connected in the sliding groove.
6. The top wire forming device for a long-wire forming machine suitable for high-speed special paper machines according to claim 5, characterized in that... The high-pressure cleaning device includes a fixed column, a water mist box connected to the fixed column, and an external pressurizing device, with the top net located outside the water mist box.
7. A top wire forming device for a long-wire forming machine suitable for high-speed special paper machines according to claim 6, characterized in that... The base includes a fixing component and a sliding component. The sliding component is slidably connected to the fixing component. A piston is provided on the fixing column, and the piston and the sliding component are fixedly connected.